We buy  IpSwitch IM v 1.0.1
and the IM server is behind a Firewall CheckPoint, i opened the  5177 y 5178 ports , but users out of my LAN can't send and receive messages on line, they receive their messages off Line.
user inside my LAN not problems at all
 
Can you tell me , if there anhoters ports that i must  open???
 
best regards
 
 
 

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